ReverseChainSingleSubst

allsorts_subset_browser::layout

Enum ReverseChainSingleSubst 

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pub enum ReverseChainSingleSubst {
    Format1 {
        coverage: Rc<Coverage>,
        backtrack_coverages: Vec<Rc<Coverage>>,
        lookahead_coverages: Vec<Rc<Coverage>>,
        substitute_glyphs: Vec<u16>,
    },
}
Expand description

GSUB Lookup Type 8 Subtable Formats

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Format1

Format 1

Fields

§coverage: Rc<Coverage>

Coverage table for the single input glyph

§backtrack_coverages: Vec<Rc<Coverage>>

Array of backtrack sequence coverages, ordered by glyph sequence

§lookahead_coverages: Vec<Rc<Coverage>>

Array of lookahead sequence coverages, ordered by glyph sequence

§substitute_glyphs: Vec<u16>

Array of substitute glyphs, ordered by coverage index

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impl ReverseChainSingleSubst

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pub fn apply_glyph( &self, glyph: u16, f: impl Fn(&MatchContext<'_>) -> bool, ) -> Result<Option<u16>, ParseError>

Apply the substitution to the supplied glyph

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impl ReadBinaryDep for ReverseChainSingleSubst

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fn read_dep<'a>( ctxt: &mut ReadCtxt<'a>, cache: Self::Args<'a>, ) -> Result<Self, ParseError>

Parse a GSUB Lookup Type 8 Subtable from the given read context

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type HostType<'a> = ReverseChainSingleSubst

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type Args<'a> = &'a Rc<LayoutCacheData<GSUB>>

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